Quiz 2025 TeraData High Hit-Rate TDVAN5: HCIA-Datacom V1.0 Verified Answers

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TeraData TDVAN5 Exam Syllabus Topics:

Topic	Details
Topic 1	Monitoring Vantage: This section of the exam measures the skills of IT professionals such as system administrators. It covers how to effectively use Viewpoint to investigate system conditions, monitor external queries, and administer both Viewpoint and monitored systems.
Topic 2	Integration: This section tests the skills of database administrators in utilizing integration tools like QueryGrid and NOS. It covers the benefits, features, and functionality of QueryGrid, the database objects supporting its implementation, and the performance implications of accessing NOS and foreign servers.
Topic 3	Performance Management: This section of the exam evaluates the skills of TeraData database administrators. It focuses on strategies for managing statistics, implementing DBQL logging, and using performance data to troubleshoot and resolve system issues.
Topic 4	Database Management: This section tests the skills of database administrators in managing access rights and advanced analytic functions. It covers logging benefits, privilege types, and the impact of changing global parameters on user sessions.
Topic 5	Security Management & Auditing: This section of the exam measures the skills of such database managers. It covers the features, functionality, and benefits of access logging and advanced security configurations.

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TeraData HCIA-Datacom V1.0 Sample Questions (Q20-Q25):

NEW QUESTION # 20
An Administrator has been presented with these performance metrics from the DBQLOGTBL table for four queries:

The Administrator needs to identify which query is suspected to be causing a full table scan or large redistribution.
Which query is producing this result?

A. QRY_B because of IO SKEW
B. QRY_C because of UII
C. QRY_D because of CPU SKEW
D. QRY_A because of PJI

Answer: A

Explanation:
IO SKEW refers to an uneven distribution of I/O operations across AMPs, which can occur during large redistributions or full table scans, as data needs to be read from or written to the entire table. High IO skew indicates that some AMPs are handling significantly more I/O than others, which is often a sign of inefficient data distribution or full table scanning.
QRY_B has an IO SKEW value of 2.76, which is much higher than the other queries, suggesting that it is likely performing a full table scan or large redistribution, as this would result in uneven I/O across AMPs.
CPU SKEW (as seen in QRY_D) could indicate an issue with CPU load balancing, but it doesn't necessarily suggest a full table scan or redistribution.
UII (Utility Impact Index) and PJI (Product Join Index) are also metrics that might indicate query inefficiencies, but the high IO SKEW in QRY_B is the most direct indicator of a full table scan or large redistribution.
QRY_B is the query suspected of causing the full table scan or large redistribution due to its high IO SKEW value.

NEW QUESTION # 21
Given a user creation request on a 10-AMP system:
CREATE USER hr_user AS PERM = 100e9 SKEW = 10 PERCENT,
SPOOL = 100e9 SKEW = 20 PERCENT;
How does the SKEW factor affect the user's Perm space, assuming the total space consumed is under the specified perm space limit?

A. The per AMP limit of 10 GB can be breached to any percent.
B. The per AMP limit of any AMP can reach 11 GET
C. The per AMP limit of any AMP can reach 20 GB.
D. The per AMP limit of 100 GB can be breached up to 10 percent.

Answer: B

Explanation:
In the given CREATE USER statement, the SKEW = 10 PERCENT parameter applies to Perm space and allows some AMPs (Access Module Processors) to use up to 10% more space than the average allocation across the AMPs.
The user is allocated 100 GB of Perm space across a 10-AMP system, meaning the average space per AMP is 10 GB.
With a 10% skew allowed, this means that an AMP can use up to 10% more than the average allocation, which is 10 GB + 1 GB = 11 GB.

NEW QUESTION # 22
An Administrator is required to load sensor data from cloud storage. This store contains many numeric columns.
Which strategy should the Administrator use to optimize the data load?

A. Use a more generic LOCATION string in the USING clause.
B. Keep the original VARCHAR data types in JSON or CSV for columns.
C. Cast column data types to appropriate values in a view of the foreign table.
D. Collect statistics on all payload attributes.

Answer: C

Explanation:
When loading sensor data, especially if it involves many numeric columns, casting the data to appropriate types (like INT, FLOAT, etc.) in a view can significantly improve query performance and reduce storage overhead. This approach ensures that the numeric data is handled efficiently, avoiding unnecessary conversions or using inefficient data types such as VARCHAR.

NEW QUESTION # 23
Which data type could support an index definition on a table?

A. Large Object (LOB)
B. JSON
C. DATASET
D. Geospatial

Answer: D

Explanation:
Geospatial data types can support index definitions in Teradata. Geospatial indexing is used to optimize spatial queries, enabling efficient searching and retrieval of data based on spatial coordinates (e.g., points, lines, polygons).
The other data types do not support indexing directly:
DATASET: This is used to store unstructured or semi-structured data and typically does not support indexing.
JSON: While JSON data can be used within Teradata, it is typically not indexed in the traditional sense.
Large Object (LOB): LOBs (like BLOBs or CLOBs) are generally used for storing large amounts of unstructured data and are not suitable for indexing due to their size and nature.

NEW QUESTION # 24
Which compression format is supported by NOS?

A. ORC
B. Snappy
C. BZIP
D. ZLIB

Answer: B

Explanation:
NOS (Native Object Store) supports data compression formats such as Snappy for efficient storage and retrieval of data.
ORC (Optimized Row Columnar) is a file format, not a compression format.
ZLIB is a compression library but is not the primary format used in NOS.
BZIP is a compression format, but it is not widely supported by NOS compared to Snappy.

NEW QUESTION # 25
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Quiz 2025 TeraData High Hit-Rate TDVAN5: HCIA-Datacom V1.0 Verified Answers

TeraData TDVAN5 Exam Syllabus Topics:

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TeraData HCIA-Datacom V1.0 Sample Questions (Q20-Q25):

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